“A . . . significant example of language turnover can be seen in the sudden shift of meaning associated with the ethnic term “black.” For years, dark-skinned Americans regarded the term as racist. Liberal whites dutifully taught their children to use the term “Negro” and to capitalize the “N.” Shortly after Stokely Carmichael proclaimed the doctrine of Black Power in Greenwood, Mississippi in June, 1966, however, “black” became a term of pride among both blacks and whites in the movement for racial justice. Caught off guard, liberal whites went through a period of confusion, uncertain as to whether to use Negro or black. Black was quickly legitimated when the mass media adopted the new meaning. Within a few months, black was “in,” Negro “out.”

—Alvin Toffler, Future Shock, 1970.